Even Henry David Thoreau found this glacial pothole irresistible.

Elevated freight railway turned wildly successful urban park.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The author of Uncle Tom's Cabin was neighbors with Mark Twain while living in this Connecticut home.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

The beautiful behemoth is one of the largest trees of its kind in the United States.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

This urban oasis is a marvelous meld of music and landscape architecture.

Soaring over the Niagara Whirlpool since 1916.

This former steel and coal plant is now a neon-lit industrial fantasia.

This strategic isle was once swapped between empires and almost entirely destroyed in a bomb explosion.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

This viaduct serves as a reminder of World War II.

Cold war icon and onetime "hole" in the iron curtain.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

The "Prussian Versailles" that is as glorious today as when it was built.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

A ruined castle stands atop a hill surrounded by dragon lore.